﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.SessionState;
using CourseScheduling.DataAccess;
using System.Web.Configuration;

namespace CourseScheduling
{
    public class Global : System.Web.HttpApplication
    {

        void Application_Start(object sender, EventArgs e)
        {
            // Code that runs on application startup
            //
            System.Configuration.ConnectionStringSettingsCollection conn = WebConfigurationManager.ConnectionStrings;
            string connection = conn["ApplicationServices"].ConnectionString;

            Application["CSDataManager"] = new CSDataManager(connection);
        }

        void Application_End(object sender, EventArgs e)
        {
            //  Code that runs on application shutdown

        }

        void Application_Error(object sender, EventArgs e)
        {
            // Code that runs when an unhandled error occurs

        }

        void Session_Start(object sender, EventArgs e)
        {
            // Code that runs when a new session is started
            //
            Session["StudentRequests"] = new List<CSCourseRequest>();
            Session["CoursePreferences"] = new List<CSCoursePreference>();
        }

        void Session_End(object sender, EventArgs e)
        {
            // Code that runs when a session ends. 
            // Note: The Session_End event is raised only when the sessionstate mode
            // is set to InProc in the Web.config file. If session mode is set to StateServer 
            // or SQLServer, the event is not raised.
            var reqs = Session["StudentRequests"] as List<CSCourseRequest>;
            if (reqs != null)
            {
                reqs.Clear();
            }

            var prefs = Session["CoursePreferences"] as List<CSCoursePreference>;
            if (prefs != null)
            {
                prefs.Clear();
            }
        }
    }
}
